"PWA72653 MASTER GAGE CONSISTS OF A FRONT SUPPORT CONNECTED TO A REAR SUPPORT BY (2) CONNECTOR TUBE ASSEMBLIESTHE FRONT SUPPORT HOUSES A FIXED ANVILHAVING A VERTICAL WALL THAT LOCATES/CONTACTS (1) OF THE (2) OFFSET PROBES OFPWA72652 GAGE. THE SET MASTER IS STORED WITH COMPANION PWA72652 GAGE IN A FOAM PADDED STORAGE CONTAINER WHEN NOT IN USE.SERD NUMBER 9427.ENGINE-ASY TURBOFAN, TYPE F100"